Add Check for Peek Stream validity to decoder test.

Change-Id: I9b745670a9f842582c47e6001dc77480b31fb6a1

test/decode_test_driver.cc

@@ -15,6 +15,14 @@
 
 namespace libvpx_test {
 
+const char kVP8Name[] = "WebM Project VP8";
+
+vpx_codec_err_t Decoder::PeekStream(const uint8_t *cxdata, size_t size,
+                                    vpx_codec_stream_info_t *stream_info) {
+  return vpx_codec_peek_stream_info(CodecInterface(), cxdata, size,
+                                    stream_info);
+}
+
 vpx_codec_err_t Decoder::DecodeFrame(const uint8_t *cxdata, size_t size) {
   vpx_codec_err_t res_dec;
   InitOnce();
@@ -29,10 +37,32 @@ void DecoderTest::RunLoop(CompressedVideoSource *video) {
   vpx_codec_dec_cfg_t dec_cfg = {0};
   Decoder* const decoder = codec_->CreateDecoder(dec_cfg, 0);
   ASSERT_TRUE(decoder != NULL);
+  const char *codec_name = decoder->GetDecoderName();
+  const bool is_vp8 = strncmp(kVP8Name, codec_name, sizeof(kVP8Name) - 1) == 0;
 
   // Decode frames.
   for (video->Begin(); video->cxdata(); video->Next()) {
     PreDecodeFrameHook(*video, decoder);
+
+    vpx_codec_stream_info_t stream_info;
+    stream_info.sz = sizeof(stream_info);
+    const vpx_codec_err_t res_peek = decoder->PeekStream(video->cxdata(),
+                                                         video->frame_size(),
+                                                         &stream_info);
+    if (is_vp8) {
+      /* Vp8's implementation of PeekStream returns an error if the frame you
+       * pass it is not a keyframe, so we only expect VPX_CODEC_OK on the first
+       * frame, which must be a keyframe. */
+      if (video->frame_number() == 0)
+        ASSERT_EQ(VPX_CODEC_OK, res_peek) << "Peek return failed: "
+            << vpx_codec_err_to_string(res_peek);
+    } else {
+      /* The Vp9 implementation of PeekStream returns an error only if the
+       * data passed to it isn't a valid Vp9 chunk. */
+      ASSERT_EQ(VPX_CODEC_OK, res_peek) << "Peek return failed: "
+          << vpx_codec_err_to_string(res_peek);
+    }
+
     vpx_codec_err_t res_dec = decoder->DecodeFrame(video->cxdata(),
                                                    video->frame_size());
     if (!HandleDecodeResult(res_dec, *video, decoder))

test/decode_test_driver.h

@@ -49,6 +49,9 @@ class Decoder {
     vpx_codec_destroy(&decoder_);
   }
 
+  vpx_codec_err_t PeekStream(const uint8_t *cxdata, size_t size,
+                             vpx_codec_stream_info_t *stream_info);
+
   vpx_codec_err_t DecodeFrame(const uint8_t *cxdata, size_t size);
 
   DxDataIterator GetDxData() {
@@ -85,6 +88,10 @@ class Decoder {
         &decoder_, cb_get, cb_release, user_priv);
   }
 
+  const char* GetDecoderName() {
+    return vpx_codec_iface_name(CodecInterface());
+  }
+
  protected:
   virtual vpx_codec_iface_t* CodecInterface() const = 0;